public class ArithmeticOperatorExercise01 {
	public static void main(String[] args) {
		int i = 1;//i -> 1
		i = i++;  //规则使用临时变量 （1）temp = i (2) i = i + 1 (3) i = temp;
		System.out.println(i); //1
		i = ++i;  //规则使用临时变量 （1) i = i + 1; temp = i; i = temp;
		System.out.println(i);//2

		int i1 = 10；
		int i2 = 20;
		int i = i1++;
		System.out.println("i = " + i); //10
 		System.out.println(i2); //20

 		i = --i2;
 		System.out.println("i = " + i);
 		System.out.println("i2 = " + i2);
	}
}